71. Identifikacija izvora gozdnega reprodukcijskega materiala bukve s pomočjo molekularnih metodMarjana Westergren, Marko Bajc, Domen Finžgar, Gregor Božič, Hojka Kraigher, 2017, original scientific article Abstract: Od kakovosti in izvora gozdnega reprodukcijskega materiala (GRM) bodo odvisni genetska pestrost, struktura, preživetje in uspevanje sadik ter končno uspevanje in odpornost bodočega gozda. Zato mora Gozdarski inštitut Slovenije (GIS) na podlagi javnega pooblastila po Zakonu o gozdovih in zahtev zakonodaje o GRM preveriti njegov izvor pred izdajo glavnega spričevala ali na zahtevo inšpektorata kadarkoli v času trženja in uporabe. Uporaba molekularnih metod pripomore k vedenju o izvoru in genetski kakovosti GRM. GIS kontinuirano razvija znanje, infrastrukturo, gensko banko in molekularne baze podatkov za izvajanje opisanih testov. Zaradi suma o (načrtno) napačni navedbi izvora GRM, nabranega jeseni 2016 iz vsaj enega semenskega objekta, smo v predstavljeni študiji analizirali izvor in genetsko pestrost GRM iz štirih semenskih objektov bukve (Fagus sylvatica L.), v katerih je bilo seme nabrano v istem letu, ter drugih vzorcev iz Slovenske gozdne genske banke, skupaj petnajst. Za analize smo uporabili jedrne mikrosatelite, šestnajst lokusov, ki jih na GIS uporabljamo rutinsko. S tehničnega vidika so se izbrani markerji izkazali za primerne za identifikacijo posameznikov, oceno genetske pestrosti in identifikacijo domnevnega izvora. Zaradi možnosti mešanja vzorcev, pridobljenih s tal, in tehničnih potreb bomo v prihodnosti za potrebe rekonstrukcije genotipa semenskega drevesa analizirali vsaj dvanajst semen na drevo. Genetska pestrost manjših vzorcev je bila značilno manjša od tiste v velikih vzorcih. Opozarjamo, da je GRM nujno treba nabirati najmanj z v odobritvi semenskega objekta predpisanega števila dreves, da zagotovimo ustrezno veliko genetsko pestrost GRM, ki ga sadimo v gozdove. Metode razvrščanja posameznikov na podlagi Bayesove verjetnosti in filogenetska drevesa so pravilno določili izvor referenčnih vzorcev, medtem ko je bila resolucija analize glavnih komponent manjša. Vse metode, uporabljene za identifikacijo domnevnega izvora vzorcev semena, so nedvoumno pokazale, da vzorec TURs ni bil nabran v sestoju TUR, različen je tudi od preostalega analiziranega genofonda bukve v Sloveniji.
Keywords: Fagus sylvatica, gozdni reprodukcijski material, identifikacija izvora, genetska pestrost, mikrosateliti, analiza starševstva, Slovenija
Published in DiRROS: 03.09.2017; Views: 4039; Downloads: 745
 Full text (512,44 KB) |
72. Identification of types of ectomycorrhizae on seedlings in a beech provenance trialMarjana Westergren, Tine Grebenc, Gregor Božič, Robert Brus, Hojka Kraigher, 2004, original scientific article Abstract: Root systems and types of ectomycorrhizae (ECM) were analysed on three 7-year-old beech seedlings (Fagus sylvatica L.) of three provenances (Val di Sella, Idrija, Nizbor) from an international beech provenance trial and on a naturally regenerated 5-year-old beech seedling from the same site (Kamenski vrh by Novo mesto). All short roots were mycorrhizal. In the sampled 20,302 root tips 49 % were non-turgescent and unidentifiable ECM. Twenty-two different types of ECM were identified, out of which 11 were successfully determined either to the species or genus level. All ECM were described by morphological and anatomical characteristics, basidiomycetes also by molecularmethods. ECM that was not successfully determined either to the species or genus level formed a new cluster in the Slovenian mycorrhizal molecular database. Species richness and percentage of vital ECM roots were highest for the provenance from Idrija (Slovenia). The results indicate that there might be differences between provenances regarding the abundance of ECM,which should be further studied.
Keywords: beech, provenance trial, ectomycorrhizae, types of ectomycorrhizae
Published in DiRROS: 12.07.2017; Views: 4433; Downloads: 1922
Full text (2,48 MB) |
73. Predstavitev strokovnih osnov za pripravo dopolnitev in sprememb Pravilnika o določitvi provenienčnih območij : (Ur. l. RS 72/2003, 58/2012) : ekspertizaMarjana Westergren, Hojka Kraigher, 2017, treatise, preliminary study, study Keywords: strukture drevesnih vrst, provenienčna območja, ekološke značilnosti, genetika, tujerodne drevesne vrste
Published in DiRROS: 12.07.2017; Views: 2903; Downloads: 609
Full text (825,17 KB) |
74. Ukrepi za zagotavljanje genskega varstva gozdov, identificiranih v okviru ciljnega raziskovalnega projekta V4-1140 : elaboratMarjana Westergren, Gregor Božič, Andrej Verlič, Hojka Kraigher, 2014, treatise, preliminary study, study Keywords: gozdni genski viri, drevesa, varovanje, gozdovi, tehnične smernice, ohranitev
Published in DiRROS: 12.07.2017; Views: 2844; Downloads: 719
Full text (4,83 MB) |
75. |
76. |
77. |
78. Morphological variability of Fraxinus angustifolia Vahl in the north-western BalkansKristjan Jarni, Marjana Westergren, Hojka Kraigher, Robert Brus, 2011, original scientific article Abstract: Fraxinus angustifolia Vahl is a species native in the north-western Balkans, where it has a divided range. Most of its range is
located in flood-prone riparian sites in the Pannonian plain but the species is also found on humid sites along some rivers in the
Submediterranean region. We analysed morphologic variation within and between five populations (14 trees/population) located in the Subpannonian and Submediterranean region of Slovenia. Thirty two characters were assessed on ca. 80 leaves from
each tree which were divided depending on exposure to sunlight (sun and shade leaves), and 8 traits on each fruit (ca. 50 fruits/
tree). A hierarchically designed experiment using analysis of variance confirmed the significant contribution of all the analysed
hierarchical levels of variation to the total variation. The results show that the differences between the trees in a single population are the greatest factor of variability of leaves, followed by differences between populations and differences which are the result of variation in exposure to sunlight. Leaves in shade positions are typically larger than those in sunny positions, and they
have broader and shorter-pointed leaflets; in this feature they are very similar to the leaves of F. excelsior. Stepwise discriminant
analysis showed that the traits which refer to the leaflet number and length are the best differentiating traits between individual populations. The Submediterranean population Dragonja stands out with the smallest leaves and the population Lijak from
the same region is the most similar to Dragonja for most morphological traits. In general, phenotypic differences between the
Subpannonian and the Submediterranean populations of F. angustifolia are minor and indistinct. Based on the differences ascertained by the study, we can only confirm the presence of F. angustifolia subsp. oxycarpa (Bieb. ex Willd.) Franco et Rocha Alfonso in this part of its natural range.
Published in DiRROS: 12.07.2017; Views: 2911; Downloads: 1332
Full text (772,86 KB)
This document has many files! More... |
79. |
80. |
